Gate valve



FIG. 1 is a perspective view taken from the bottom, front and left side of a gate valve showing my new design;

FIG. 2 is a front elevational view thereof, showing the valve in an open position;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a bottom plan view of FIG. 1;

FIG. 5 is a top plan view of FIG. 1; and

FIG. 6 is a right side elevational view of FIG. 1. 

The ornamental design for a gate valve, as shown and described. 